Double row  tapered roller bearings

Double row tapered roller bearings

Double-row taper roller bearings are a type of taper roller bearings. It has two outer and inner rings arranged back against the back and separated from the middle partial ring or no circle.
Applications: Cement vertical mill rollers, Steel Production Equipment (Roll neck, Vertical Roll Neck, Plate mill, Strip mill, Hot rolling mill, Hot strip mill, Cold rolling mill)
Alternative brands: TIMEKN, SKF, Koyo, FAG, NSK

For Double-row taper roller bearings, the contact angle determines the axial bearing capacity. The larger the angle value, the greater the axial bearing capacity. It is mainly used to withstand radial and axial combination loads based on radial loads and can withstand two-way axial loads.

  • Two basic double-row taper roller bearing styles exist: the two-row converging TDI configuration and the two-row diverging TDO configuration.

  • Depending on the application, these bearings are made using high chrome through hardening or case-hardened carburizing alloy steels. The cages for FV double-row taper roller bearings are stamped pressed steel, and a steel pin-type cage is also available, which allows a larger complement of rollers for higher capacity.


  • This style of bearing set simplifies design and reduces the danger of bearing clearance changes due to axial shaft expansion. Therefore, defining the proper internal play related to the application is important.


  • TDI designs:

  • TDI design have a double cone assembly and two single cups, and they are generally supplied with a cup spacer. The cup spacer of each bearing is face ground after accurately measuring the distance between adjacent cup faces to obtain a predetermined internal play. Consequently, spacers or components may not be interchanged. An annular groove and lubrication holes are included in the spacer. The contact angle converges, so using these bearings will not appreciably increase the rigidity of the shaft mounting. FV also produces the taper roller steep contact angle TDIS version with higher thrust capacity (while the radial one is reduced) than the TDI type, normally used as backup thrust bearings in rolling mills. These TDIS bearings combine face slots (e.g., N, N1, N2, etc.) and bore key-way for locking the cone on the shaft. Also, helical grooves in the bore and lubrication grooves in the side faces of double cone and retention sleeves with annular grooves and lubrication holes can be provided.


  • TDO design:

  • FV bearings in TDO configuration have a double cup and two single cone assemblies and can be supplied with a shaft-supported cone spacer. 

  • The spacer for individual cones faces the ground to obtain the desired internal play for the assembly. So, also, in this case, spacers and components may not be interchanged. An annular groove and oil holes are included in the cone spacer.

  • The TDO style bearings are mainly used in a floating cup mounting. So, the counterbored hole in the cup is for a drilled dowel pin, which prevents the rotation of the loosely fitted double cup. Additional features of a lubrication groove and oil holes in the double cup for simplified lubrication through the outer ring are included (suffix CD). However, this bearing style is usually lubricated through the shaft using oil holes and a groove in the cone spacer.

  • In the TDO type, the contact angle diverges, so the rigidity of the shaft mounting is increased to resist overturning moments.

  • Bearing sets with steep contact angle and intermediate ring, pierced rollers and steel pin-type cage (TDOS design), bearing sets with extended inner rings which abut each other (TDONA and TDONASW designs), bearing sets with heavy wall cup (TNASWH design) and bearing sets with shields of pressed steel (TDO 4422 design) are also in FV manufacturing program. 


  • Most TDI and TDO double-row taper roller bearings are produced with inch dimensions as per American AFBMA 19/1974. As per FV standard practice, dimensional and running accuracy grade is by class 2 or 4.


  • Double-row taper roller bearings have some unique characteristics

  • High carrying capacity

  • Due to the large number of rollers, the double-row taper roller bearings have higher carrying capacity and can withstand larger radial and axial loads.

  • High-rigidity

  • The angle of the inner and outer rollers of the double-column cone roller bearings is the same, so it has high rigidity and can withstand larger bending and twisting forces.

  • High-precision

  • The inner and outer rings of the double-row taper roller bearings are precisely processed, and the number of contact points between the roller and the roller roads is greater. Therefore, it has high precision and can meet the requirements of high-precision machine tools and precision instruments.

  • Can withstand heavy composite (radial and axial) load, strong rigidity. Axial fixation can be fixed in both directions with a certain axial gap or preload.


  • The material for Double-row tapered roller bearing 

  • The material choice of the double-row taper roller bearings is very important because the material of the bearings directly affects its performance and life.

  • The materials that can be chosen include GCR15, GCR15Simn, GCR18MO, and carburizing steel. These steels have good hardening and abrasion resistance.

  • For large-sized four-row taper roller bearings, FV Bearing will also use imported carburizing steel according to the actual working conditions of the customer, such as Timken 33311 from the United States, carburizing steel from European OVAKO.


  • Delivery period of Double-row tapered roller bearing

  • According to different materials, the delivery period of the double-row taper roller bearings is different.

  • If choose material GCR15, GCR15SIMN, GCR18MO, the delivery period is 35-40 days

  • If the chosen material, carburizing steel, is used, the delivery period is 80-90 days.

  • Application of Double-row tapered roller bearing

  • Double-row tapered roller bearings are also widely used, mainly including:

  • Heavy machinery and equipment, such as bridge cranes, extrusion machines, mining equipment, etc.

  • Equipment with high requirements, such as CNC machine tools, precision instruments, etc.

  • In these devices, double-row tapered roller bearings can bear combined radial and axial loads and have the characteristics of high precision and high rigidity, which can ensure the stable operation of mechanical equipment and improve the operating efficiency of equipment.

  • The TDO models list of FV can provide:

  • ModelsDimensionBasic load ratingDesign types and features
    DynamicStatic
    d[mm]D[mm]T[mm]B[mm]C[kN]C0[kN]
      331945  228.6  488.95  254  152.4  3 143  4 500  TDO/D
      BT2B 328130  260  480  284  220  4 330  7 350  TDO
      BT2B 332504/HA2  300.038  422.275  174.625  136.525  2 177  4 750  TDO/XDC
      BT2B 332830  340  460  160  128  2 196  4 900  TDO/D
      BT2B 332831  360  480  160  128  2 211  5 000  TDO/D
      BT2B 332603/HA1  368.249  523.875  214.312  169.862  3 380  7 500  TDO/D
      331197 A  384.175  546.1  222.25  177.8  3 724  8 300  TDO/D
      BT2-8143/HA1  400  540  170  135  2 782  6 300  TDO/D
      331656  415.925  590.55  244.475  193.675  4 175  9 650  TDO/XDC
      BT2B 332604/HA1  431.8  571.5  155.575  111.125  1 980  5 100  TDO/D
      331657  479.425  679.45  276.225  222.25  5 010  12 700  TDO/XDC
      331605 B  498.475  634.873  177.8  142.875  2 750  7 350  TDO/XDC
      BT2B 332605 A/HA1  501.65  711.2  292.1  231.775  5 500  13 700  TDO/XDC
      BT2B 332446  536.575  761.873  311.15  247.65  6 270  16 000  TDO/DC
      331640 A  558.8  736.6  225.425  177.8  4 290  11 600  TDO/DC
      BT2B 328028/HA1  711.2  914.4  190.5  139.7  3 800  9 650  TDO/D
      331554 A  723.9  914.4  187.325  139.7  3 800  9 650  TDO/D3
      BT2B 331554 B/HA1  723.9  914.4  187.325  139.7  3 800  9 650  TDO/D3
      BT2B 332501/HA5  914.4  1 066.8  139.7  101.6  2 600  8 000  TDO.1/D
      BT2B 332780/HA5  1 160  1 540  400  290  14 200  38 000  TDO.1/D
  • The TDI models list of FV can provide:

  • ModelsDimensionBasic load ratingDesign types and features
    DynamicStatic
    d[mm]D[mm]T[mm]B[mm]C[kN]C0[kN]
      BT2B 332931  240  480  220  200  3 615  5 500  TDI/WIY2
      332168  300  440  105  105  1 076  2 040  TDIS/NY
      BT2B 332685/HA1  303.212  495.3  263.525  263.525  4 919  9 800  TDIT/Y2
      332068  305.033  560  200  200  2 920  5 300  TDIS/N2Y
      332169 A  305.07  500  200  200  2 734  5 200  TDIS/N
      332169 AA  305.07  500  200  200  2 734  5 200  TDIS/NY
      BT2B 334110/HA3  305.07  0  200  200  2 734  5 200  TDIS.2/N
      BT2B 328695 A/HA1  333.375  469.9  166.688  166.688  2 642  5 700  TDIT/Y2
      331527 C  346.075  488.95  174.625  174.625  2 835  6 300  TDI/WIY2
      BT2B 332913/HB1  346.075  488.95  104.775  95.25  1 170  2 750  TDI/Y2
      BT2-8009/HA3  380  560  200  200  2 991  6 550  TDIS/NY
      331158 A  384.175  546.1  193.675  193.675  3 724  8 300  TDI/GWIY2
      BT2B 331837  384.175  546.1  193.675  193.675  3 724  8 300  TDI/Y2
      BT2B 328035/HA1  385.762  514.35  152.4  152.4  2 290  6 000  TDI/GWIY2
      BT2B 328934/HA3  390  690  200  200  2 967  6 550  TDIS.2/N
      BT2B 334045/HA3  390  568  180  180  2 550  5 850  TDIS.2/N1
      332167  400  650  240  240  3 910  8 150  TDIS/N2Y
      BT2B 332167 DA/HA1  400  650  240  240  3 910  8 150
      BT2B 331840 C/HA1  406.4  546.1  138.113  138.113  2 339  5 100  TDI/WIY2
      BT2B 334085 A/HA1VA928  406.4  580  164.275  164.275  1 973  4 250  TDIS.2/N1V
      BT2B 328283/HA1  415.925  590.55  209.55  209.55  4 175  9 650  TDIT/Y2
      BT2-8016/HA3  420  0  200  200  2 970  7 200  TDIS.2/N2
      BT2B 334113/HA3VA901  445  620  180  180  2 120  5 100  TDIS.2/NV
      BT2B 332911 C/HA1  447.675  635  223.838  223.838  4 400  11 000  TDIT/Y2
      BT2B 328523/HA1  450  595  178  178  3 169  8 150  TDI/WIY2
      BT2B 334030/HA1  460  9 999  180  180  3 140  6 950  TDIS.2/N1
      BT2-8215  464  615  150  136  2 160  5 850  TDI
      BT2B 334112/HA3  482  0  160  160  1 760  5 200  TDIS.2/N
      BT2-8142/HA3  482.6  733.425  190  190  2 860  8 300  TDIS/NY
      BT2B 331848  489.026  634.873  152.4  152.4  2 750  7 350  TDI/Y2
      331676 A  500  730  280  280  6 600  16 000  TDI.1/Y2
      331182 A  501.65  711.2  250.825  250.825  5 500  13 700  TDI/GWIY2
      BT2B 332662 B/HB1  519.113  736.6  258.762  258.762  6 050  15 600  TDI/Y2
      BT2B 332662/HB1  519.113  736.6  258.762  258.762  6 050  15 600  TDI/Y2
      331607 B  558.8  736.6  196.85  196.85  4 290  11 600  TDI/Y2
      BT2B 332626/HA7  560  820  242  242  5 010  11 400  TDI.1/Y2
      BT2B 331476 AG/HA1  571.5  812.8  285.75  285.75  7 210  18 000  TDI/GWIY2
      BT2B 331854 C/HA1  571.5  812.8  285.75  285.75  7 210  18 000  TDI/Y2
      BT2B 331854/HA1  571.5  812.8  285.75  285.75  7 210  18 000  TDI/Y2
      331677  580  830  280  280  6 820  16 600  TDI.1/Y2
      BT2B 332424/HA3  609.6  820  171.45  171.45  4 020  10 600  TDI/GWIY2
      331555 B  635  939.8  304.8  304.8  6 710  16 600  TDIS/N1Y
      BT2B 328306/HA4  650  1 030  270  270  8 800  18 300  TDI.1/Y2
      BT2-8164/HA4  690  980  355  355  10 227  25 000  TDI/Y2


A Leading Industrial Bearings Supplier

Why Choose FV Bearings?

FV Bearing is a leading supplier of precision bearings and bearings related products across a large spectrum of customers – preimarily OEMs and major distributors.

Leading industrial ball bearings with best materials

Accurate response to client’s request

FV Bearings Co.Ltd has rich experiences in bearings manufacturing and processing, the professional bearing engineers can handle your requirements on bearings exactly and output the accurate bearing products.

World’s leading roller bearings manufacturer

FV Bearings is a leading roller bearings manufacturer provides high quality and durable roller bearings for different industries such as automotive, aerospace, machinery, power plants, chemistry industry, agriculture and other fields.

Solutions for special bearings and high end bearings

If you are looking for special bearings and high end bearings, FV bearings can help you to customize any special bearings according to your needs based on advanced bearings manufacturing technology.

Send us an Email for Quote

sales@fv-bearing.com